Two kinds of pseudogaps in Bi1.79Pb0.37Sr 1.86CuO6+δ studied by the out-of-plane resistivity in magnetic fields

Kazutaka Kudo; Yoshiyuki Miyoshi; Takahiko Sasaki; Terukazu Nishizaki; Norio Kobayashi

doi:10.1143/JPSJ.75.124710

Two kinds of pseudogaps in Bi_1.79Pb_0.37Sr _1.86CuO_6+δ studied by the out-of-plane resistivity in magnetic fields

Kazutaka Kudo, Yoshiyuki Miyoshi, Takahiko Sasaki, Terukazu Nishizaki, Norio Kobayashi

IMR - Materials Property Division

Tohoku University

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

We report the out-of-plane resistivity of Bi_1.79Pb _0.37Sr_1.86CuO_6+δ single crystals with various doping levels in magnetic fields up to 15 T parallel to the c-axis. By using the low-T_c system sensitive to magnetic fields, two kinds of pseudogaps PG1 and PG2 are found at T₁* and T ₂* below which the nonmetallic resistivity starts to develop and to be suppressed in magnetic fields with decreasing temperature, respectively. The doping dependence of T₂* exhibits a dome-like shape similar to T_c, indicating the close relation between PG2 and the superconductivity, while T₁* decreases monotonically with increasing the doping level. Systematic hole-doping reveals that T ₁* exists even in the heavily overdoped nonsuperconducting sample, indicating the weak relation between PG1 and the superconductivity.

Original language	English
Article number	124710
Journal	Journal of the Physical Society of Japan
Volume	75
Issue number	12
DOIs	https://doi.org/10.1143/JPSJ.75.124710
Publication status	Published - 2006 Dec

Keywords

Modulation free
Out-of-plane resistivity
Pb-doped Bi2201
Pseudogap
Superconductivity

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10.1143/JPSJ.75.124710

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title = "Two kinds of pseudogaps in Bi1.79Pb0.37Sr 1.86CuO6+δ studied by the out-of-plane resistivity in magnetic fields",

abstract = "We report the out-of-plane resistivity of Bi1.79Pb 0.37Sr1.86CuO6+δ single crystals with various doping levels in magnetic fields up to 15 T parallel to the c-axis. By using the low-Tc system sensitive to magnetic fields, two kinds of pseudogaps PG1 and PG2 are found at T1* and T 2* below which the nonmetallic resistivity starts to develop and to be suppressed in magnetic fields with decreasing temperature, respectively. The doping dependence of T2* exhibits a dome-like shape similar to Tc, indicating the close relation between PG2 and the superconductivity, while T1* decreases monotonically with increasing the doping level. Systematic hole-doping reveals that T 1* exists even in the heavily overdoped nonsuperconducting sample, indicating the weak relation between PG1 and the superconductivity.",

keywords = "Modulation free, Out-of-plane resistivity, Pb-doped Bi2201, Pseudogap, Superconductivity",

author = "Kazutaka Kudo and Yoshiyuki Miyoshi and Takahiko Sasaki and Terukazu Nishizaki and Norio Kobayashi",

year = "2006",

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doi = "10.1143/JPSJ.75.124710",

language = "English",

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T1 - Two kinds of pseudogaps in Bi1.79Pb0.37Sr 1.86CuO6+δ studied by the out-of-plane resistivity in magnetic fields

AU - Kudo, Kazutaka

AU - Miyoshi, Yoshiyuki

AU - Sasaki, Takahiko

AU - Nishizaki, Terukazu

AU - Kobayashi, Norio

PY - 2006/12

Y1 - 2006/12

N2 - We report the out-of-plane resistivity of Bi1.79Pb 0.37Sr1.86CuO6+δ single crystals with various doping levels in magnetic fields up to 15 T parallel to the c-axis. By using the low-Tc system sensitive to magnetic fields, two kinds of pseudogaps PG1 and PG2 are found at T1* and T 2* below which the nonmetallic resistivity starts to develop and to be suppressed in magnetic fields with decreasing temperature, respectively. The doping dependence of T2* exhibits a dome-like shape similar to Tc, indicating the close relation between PG2 and the superconductivity, while T1* decreases monotonically with increasing the doping level. Systematic hole-doping reveals that T 1* exists even in the heavily overdoped nonsuperconducting sample, indicating the weak relation between PG1 and the superconductivity.

AB - We report the out-of-plane resistivity of Bi1.79Pb 0.37Sr1.86CuO6+δ single crystals with various doping levels in magnetic fields up to 15 T parallel to the c-axis. By using the low-Tc system sensitive to magnetic fields, two kinds of pseudogaps PG1 and PG2 are found at T1* and T 2* below which the nonmetallic resistivity starts to develop and to be suppressed in magnetic fields with decreasing temperature, respectively. The doping dependence of T2* exhibits a dome-like shape similar to Tc, indicating the close relation between PG2 and the superconductivity, while T1* decreases monotonically with increasing the doping level. Systematic hole-doping reveals that T 1* exists even in the heavily overdoped nonsuperconducting sample, indicating the weak relation between PG1 and the superconductivity.

KW - Modulation free

KW - Out-of-plane resistivity

KW - Pb-doped Bi2201

KW - Pseudogap

KW - Superconductivity

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JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

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ER -

Two kinds of pseudogaps in Bi_1.79Pb_0.37Sr _1.86CuO_6+δ studied by the out-of-plane resistivity in magnetic fields

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Keywords

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